I do it all the time as well. I have had some China stuff rust on me before, so anytime I rinse a atty, I always dry it off with a paper towel and blow it dry. It's good to blow the deck as dry as you can, then do some pulsing of the coils to get any gunk off and it will also dry it the rest of the way out too with the heat of the coils evaporating the left over water. Also, make sure to blow real good on the 510 connection. Water tends to collect there on some attys and you don't want any rust of water dripping down into your mods 510 once you screw it on.
There's no need to wait an hour after you rinse the atty out if you dry with paper towl, blow dry, and pulse the coils. That will get most all the water out. As a good rule of thumb I will usually set it on a paper towl on my desk for an extra 10 minutes or so just in case any small amount of water was left over.